Guteguraultrafine idasanzwe yisi
Ultrafine idasanzwe yubutaka ifite uburyo bwagutse bwo gukoresha ugereranije nubutaka budasanzwe hamwe nubunini rusange, kandi kuri ubu hari ubushakashatsi bwinshi kuri bwo.Uburyo bwo gutegura bugabanijwe muburyo bukomeye bwicyiciro, uburyo bwicyiciro cyamazi, nuburyo bwa gaz gaz ukurikije uko ibintu byegeranijwe.Kugeza ubu, uburyo bwamazi bwamazi bukoreshwa cyane muri laboratoire ninganda mugutegura ifu ya ultrafine yubutaka budasanzwe.Harimo cyane cyane uburyo bwimvura, uburyo bwa gel gel, uburyo bwa hydrothermal, uburyo bwicyitegererezo, uburyo bwa microemulsion hamwe nuburyo bwa alkyd hydrolysis, muribwo buryo bwimvura aribwo bubereye umusaruro winganda.
Uburyo bwimvura ni ukongeramo imvura kumuti wumunyu wicyuma kugirango imvura igwe, hanyuma uyungurure, ukarabe, wumye nubushyuhe ubora kugirango ubone ibicuruzwa byifu.Harimo uburyo bwimvura itaziguye, uburyo bwimvura imwe nuburyo bwa coprecipitation.Muburyo busanzwe bwimvura, okiside yisi idasanzwe hamwe numunyu wubutaka urimo aside irike irashobora kuboneka mugutwika imvura, hamwe nubunini bwa 3-5 μ m.Ubuso bwihariye buri munsi ya 10 ㎡ / g kandi ntabwo bufite imiterere yihariye yumubiri nubumara.Uburyo bwo kugwa kwa amonium karubone hamwe nuburyo bwo kugwa kwa aside ya oxyde nuburyo bukoreshwa cyane mukubyara ifu ya okiside isanzwe, kandi mugihe cyose uburyo bwimikorere yimvura ihinduwe, birashobora gukoreshwa mugutegura ifu ya ultrafine idasanzwe.
Ubushakashatsi bwerekanye ko ibintu nyamukuru bigira ingaruka ku bunini bw’imiterere na morfologiya y’ubutaka budasanzwe bwa ultrafine mu buryo bw’imvura ya ammonium bicarbonate burimo kwibumbira hamwe ku isi idasanzwe mu gisubizo, ubushyuhe bw’imvura, kwibanda ku mvura, n'ibindi. igisubizo nurufunguzo rwo gukora ifu ya ultrafine itatanye kimwe.Kurugero, mubigeragezo byimvura Y3 + kugirango utegure Y2O3, mugihe ubwinshi bwisi yubutaka budasanzwe ari 20 ~ 30g / L (ubarwa na Y2O3), inzira yimvura iroroshye, kandi ifu ya yttrium oxyde ultrafine ifata mumvura ya karubone na gukama no gutwika ni bito, bimwe, kandi Gutandukana nibyiza.
Mubisubizo byimiti, ubushyuhe nibintu byingenzi.Mu bushakashatsi bwavuzwe haruguru, iyo ubushyuhe buri 60-70 ℃, imvura iratinda, kuyungurura birihuta, ibice birarekuye kandi birasa, kandi ahanini ni serefegitura;Iyo ubushyuhe bwa reaction buri munsi ya 50 ℃, imvura igwa vuba, hamwe nintete nyinshi nubunini buke.Mugihe cyo kubyitwaramo, umubare wa CO2 na NH3 wuzuye ni muke, kandi imvura igwa muburyo bukomeye, butabereye kuyungurura no gukaraba.Nyuma yo gutwikwa muri okiside ya yttrium, haracyari ibintu bibuza guteranya cyane kandi bifite ubunini bunini.Ubwinshi bwa ammonium bicarbonate nabwo bugira ingaruka ku bunini bwa oxyde yttrium.Iyo ubunini bwa ammonium bicarbonate iri munsi ya 1mol / L, ingano ya yttrium oxyde yabonetse iba nto kandi imwe;Iyo kwibumbira kwa ammonium bicarbonate irenze 1mol / L, imvura yaho izabaho, itera agglomeration nuduce twinshi.Mugihe gikwiye, ingano yingana na 0.01-0.5 irashobora kuboneka μ M ultrafine yttrium oxyde.
Muburyo bwimvura ya oxalate, umuti wa aside ya oxyde yongeweho ibitonyanga mugihe ammonia yongeweho kugirango harebwe agaciro ka pH gahoraho mugihe cyibikorwa, bivamo ubunini buke buri munsi ya 1 μ M yifu ya yttrium.Banza, ugabanye umuti wa yttrium nitrate hamwe namazi ya amoniya kugirango ubone hydroxide hydroxide colloid, hanyuma uyihindure hamwe na acide acide kugirango ubone ubunini buke buri munsi ya 1 μ Y2O3 ifu ya m.Ongeramo EDTA kuri Y3 + igisubizo cya nitrate ya yttrium hamwe na 0.25-0.5mol / L, uhindure pH kuri 9 n'amazi ya amoniya, ongeramo okisate ya amonium, hanyuma utonyanga igisubizo cya 3mol / L HNO3 ku gipimo cya 1-8mL / min kuri 50 ℃ kugeza imvura irangiye kuri pH = 2.Ifu ya Yttrium oxyde ifite ubunini bwa 40-100nm irashobora kuboneka.
Mugihe cyo kwiteguraultrafine idasanzwe yisinuburyo bwimvura, impamyabumenyi zitandukanye za agglomeration zikunda kubaho.Kubwibyo, mugihe cyo kwitegura, birakenewe kugenzura byimazeyo imiterere ya synthesis, muguhindura agaciro ka pH, ukoresheje imvura itandukanye, ukongeraho ibitatanye, nubundi buryo bwo gukwirakwiza ibicuruzwa hagati.Noneho, uburyo bukwiye bwo kumisha bwatoranijwe, hanyuma, hanyuma, gutatanya neza isi idasanzwe ifumbire ya ultrafine ifu iboneka binyuze mukubara.
Igihe cyo kohereza: Apr-21-2023